Laser selective melting preparation method of brittle alloy with lamellar size effect
A laser selective melting and brittle alloy technology, which is applied in the direction of process efficiency improvement, additive manufacturing, and energy efficiency improvement, can solve the problems of poor plasticity of brittle alloys, and achieve the effect of avoiding waste and increasing the scope of application
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[0024] The invention provides a preparation method of a brittle alloy with layered size effect by laser selective melting technology, the method comprising the following steps:
[0025] (1) sieving the brittle alloy powder and the ductile alloy powder to obtain powder raw materials of suitable particle size in normal distribution;
[0026] (2) Put the sieved raw material into an oven to dry, remove the moisture therein, prevent the sample from being polluted during the printing process, and prepare for forming;
[0027] (3) Put the dried ductile alloy powder 7 into the raw material chamber 1, start the equipment, and inject argon gas to remove oxygen in the forming space to avoid oxidation of the formed part. The heater 3 is raised to a certain temperature to preheat the ductile alloy powder;
[0028] (4) spread the preheated ductile alloy powder in the forming cavity 2 with the powder spreading roller 4, and the excess powder falls into the spare cavity 6, and then under the...
Embodiment 1
[0041] figure 2 It is a flow chart of a TiAl alloy laser selective melting technology preparation method with layered size effect according to an embodiment of the present invention. The first is a schematic diagram of raw material loading for laser selective melting equipment, the second is a schematic diagram of the process of ductile alloy laser selective melting, and the third is a schematic diagram of replacing the raw material with TiAl alloy powder after a layer of ductile alloy is manufactured. The fourth is a schematic diagram for completing a manufacturing cycle. Such as figure 2 Shown, a kind of TiAl alloy laser selective area melting technology preparation method with layered size effect, this method comprises the following steps:
[0042] (1) Raw material screening: TiAl alloy powder and ductile alloy powder are sieved with 270 mesh and 800 mesh sieves respectively, and the 270 mesh sieve and 800 mesh sieve are taken to obtain powders with suitable particle si...
Embodiment 2
[0050] A preparation method of a TiAl alloy with layered size effect by laser selective melting technology in the embodiment of the present invention is used to prepare the Inconel 718 / TiAl alloy with layered size effect by using the laser selective melting technology of the present invention. The specific steps are as follows:
[0051] (1) First, sieve TiAl alloy powder and Inconel 718 powder with 270-mesh and 800-mesh sieves respectively, and take 270-mesh under-sieve and 800-mesh sieve to obtain raw material powder with particle size distribution between 15 and 53 μm ;
[0052] (2) Put the sieved Inconel 718 and TiAl alloy raw materials into an oven for drying, and place them at 80° C. for 5 hours to remove the moisture therein;
[0053] (3) Inconel 718 after drying is packed in raw material cavity 1, at this moment figure 2 The 7 in it is Inconel 718, and then argon gas is introduced to reduce the oxygen content in the forming chamber to below 0.4% to avoid oxidation dur...
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Abstract
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